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Chief Process Engineer; Wastewater

Remote / Online - Candidates ideally in
Manchester, Greater Manchester, M9, England, UK
Listing for: Costain Group PLC
Remote/Work from Home position
Listed on 2026-05-07
Job specializations:
  • Engineering
    Environmental Engineer, Systems Engineer, Process Engineer
Salary/Wage Range or Industry Benchmark: 80000 - 100000 GBP Yearly GBP 80000.00 100000.00 YEAR
Job Description & How to Apply Below
Position: Chief Process Engineer (Wastewater)

Overview

As AMP8 ramps up, we are looking for a Chief Process Engineer ideally based in the North West of England to join our Asset Optimisation Team and support multiple clients, including United Utilities, Northumbrian Water, and Yorkshire Water. Our team provides wastewater process engineering consultancy to support our clients across the UK to get the very best from their assets and programmes.

We are an agile technical team of process engineers working within capital delivery frameworks and on the front line with operational teams to develop innovative, practical and digital process solutions. Our team delivers optimisation studies at feasibility, concept, optioneering and preliminary design stages to mitigate risk, return sites to compliance, or enable low or no build solutions to be provided.

You will develop and lead the execution of asset optimisation projects and direct teams to propose, develop, and define process optimisation solutions. This is a home-based role with occasional site/office attendance as per business or client needs so flexibility to travel is required; our Northern office is based in Manchester, so this role will ideally suit someone based in the North West of England.

Responsibilities
  • Act as focal point for process technical discipline within our water sector frameworks.
  • Direct teams in the execution of process deliverables with accountability for quality, budget, and schedule.
  • Ensure technical assurance during design development.
  • Provide technical thought leadership and strategic consultancy advice to clients and joint venture partners.
  • Collaborate with business development, work winning and marketing functions to develop and tender new opportunities.
  • Approve process design deliverables such as calculations, drawings, reports, presentations and proposals.
  • Grow our team capability and service to our AMP Frameworks.
  • Lead troubleshooting and embedding solutions.
Essential – Knowledge, Skills, and Experience
  • Significant and proven UK experience including substantial experience in the design, operation, and optimisation of wastewater treatment plants.
  • Knowledge of the UK water utility asset life cycle process.
  • Project management experience.
  • Background in an engineering consultancy or contracting design environment as well as operational utility experience.
  • Ability to independently drive teams and projects.
  • Proactive, self-motivated and solutions biased.
  • Strong interpersonal skills, ability to collaborate and influence senior colleagues.
Desirable
  • Comprehensive knowledge of the UK Regulatory environment.
  • Experience in the full project lifecycle: scoping, outline design, detailed design, construction support, commissioning and handover.
  • Proven background in process engineering definition including development of mass balance, data analysis, design calculations, technology selection, major equipment and package datasheet specification, process flow diagrams, process control philosophies and P&’s.
  • Excellent commercial awareness and business development skills.
  • Stakeholder and project management awareness.
  • Proven leadership and line management experience.
Qualifications Essential
  • Degree level (or equivalent) in a Process related discipline
  • Chartered Engineer (CEng MICE / CEng MIStruct

    E)
Desirable
  • Member of a relevant engineering institution e.g. CIWEM, IChemE.
  • Post Graduate Qualification
About Us

Costain helps to improve people’s lives with integrated, leading edge, smart infrastructure solutions across the UK’s energy, water, transportation and defence markets. We help our clients improve their business performance by increasing capacity, improving customer service, safeguarding security, enhancing resilience, decarbonising and delivering increased efficiency. Our vision is to be the UK’s leading smart infrastructure solutions company. We will achieve this by focusing on blue chip clients whose major spending plans are underpinned by strategic national needs, regulatory commitments, legislation or essential performance requirements.

We offer our clients leading edge solutions that are digitally optimised through the following five services which cover the whole lifecycle of their assets:…

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